SurfaceFlinger.cpp revision 9c6e297271ec9af9d974242d89cfa08cb6ceaa0a 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <stdio.h>
19#include <stdint.h>
20#include <unistd.h>
21#include <fcntl.h>
22#include <errno.h>
23#include <math.h>
24#include <limits.h>
25#include <sys/types.h>
26#include <sys/stat.h>
27#include <sys/ioctl.h>
28
29#include <cutils/log.h>
30#include <cutils/properties.h>
31
32#include <binder/IPCThreadState.h>
33#include <binder/IServiceManager.h>
34#include <binder/MemoryHeapBase.h>
35#include <binder/PermissionCache.h>
36
37#include <utils/String8.h>
38#include <utils/String16.h>
39#include <utils/StopWatch.h>
40
41#include <ui/GraphicBufferAllocator.h>
42#include <ui/GraphicLog.h>
43#include <ui/PixelFormat.h>
44
45#include <pixelflinger/pixelflinger.h>
46#include <GLES/gl.h>
47
48#include "clz.h"
49#include "GLExtensions.h"
50#include "DdmConnection.h"
51#include "Layer.h"
52#include "LayerDim.h"
53#include "SurfaceFlinger.h"
54
55#include "DisplayHardware/DisplayHardware.h"
56#include "DisplayHardware/HWComposer.h"
57
58#include <private/surfaceflinger/SharedBufferStack.h>
59
60/* ideally AID_GRAPHICS would be in a semi-public header
61 * or there would be a way to map a user/group name to its id
62 */
63#ifndef AID_GRAPHICS
64#define AID_GRAPHICS 1003
65#endif
66
67#define DISPLAY_COUNT       1
68
69namespace android {
70// ---------------------------------------------------------------------------
71
72const String16 sHardwareTest("android.permission.HARDWARE_TEST");
73const String16 sAccessSurfaceFlinger("android.permission.ACCESS_SURFACE_FLINGER");
74const String16 sReadFramebuffer("android.permission.READ_FRAME_BUFFER");
75const String16 sDump("android.permission.DUMP");
76
77// ---------------------------------------------------------------------------
78
79SurfaceFlinger::SurfaceFlinger()
80    :   BnSurfaceComposer(), Thread(false),
81        mTransactionFlags(0),
82        mResizeTransationPending(false),
83        mLayersRemoved(false),
84        mBootTime(systemTime()),
85        mVisibleRegionsDirty(false),
86        mHwWorkListDirty(false),
87        mDeferReleaseConsole(false),
88        mFreezeDisplay(false),
89        mElectronBeamAnimationMode(0),
90        mFreezeCount(0),
91        mFreezeDisplayTime(0),
92        mDebugRegion(0),
93        mDebugBackground(0),
94        mDebugDDMS(0),
95        mDebugDisableHWC(0),
96        mDebugDisableTransformHint(0),
97        mDebugInSwapBuffers(0),
98        mLastSwapBufferTime(0),
99        mDebugInTransaction(0),
100        mLastTransactionTime(0),
101        mBootFinished(false),
102        mConsoleSignals(0),
103        mSecureFrameBuffer(0)
104{
105    init();
106}
107
108void SurfaceFlinger::init()
109{
110    LOGI("SurfaceFlinger is starting");
111
112    // debugging stuff...
113    char value[PROPERTY_VALUE_MAX];
114
115    property_get("debug.sf.showupdates", value, "0");
116    mDebugRegion = atoi(value);
117
118    property_get("debug.sf.showbackground", value, "0");
119    mDebugBackground = atoi(value);
120
121    property_get("debug.sf.ddms", value, "0");
122    mDebugDDMS = atoi(value);
123    if (mDebugDDMS) {
124        DdmConnection::start(getServiceName());
125    }
126
127    LOGI_IF(mDebugRegion,       "showupdates enabled");
128    LOGI_IF(mDebugBackground,   "showbackground enabled");
129    LOGI_IF(mDebugDDMS,         "DDMS debugging enabled");
130}
131
132SurfaceFlinger::~SurfaceFlinger()
133{
134    glDeleteTextures(1, &mWormholeTexName);
135}
136
137sp<IMemoryHeap> SurfaceFlinger::getCblk() const
138{
139    return mServerHeap;
140}
141
142sp<ISurfaceComposerClient> SurfaceFlinger::createConnection()
143{
144    sp<ISurfaceComposerClient> bclient;
145    sp<Client> client(new Client(this));
146    status_t err = client->initCheck();
147    if (err == NO_ERROR) {
148        bclient = client;
149    }
150    return bclient;
151}
152
153sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
154{
155    sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
156    return gba;
157}
158
159const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
160{
161    LOGE_IF(uint32_t(dpy) >= DISPLAY_COUNT, "Invalid DisplayID %d", dpy);
162    const GraphicPlane& plane(mGraphicPlanes[dpy]);
163    return plane;
164}
165
166GraphicPlane& SurfaceFlinger::graphicPlane(int dpy)
167{
168    return const_cast<GraphicPlane&>(
169        const_cast<SurfaceFlinger const *>(this)->graphicPlane(dpy));
170}
171
172void SurfaceFlinger::bootFinished()
173{
174    const nsecs_t now = systemTime();
175    const nsecs_t duration = now - mBootTime;
176    LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
177    mBootFinished = true;
178
179    // wait patiently for the window manager death
180    const String16 name("window");
181    sp<IBinder> window(defaultServiceManager()->getService(name));
182    if (window != 0) {
183        window->linkToDeath(this);
184    }
185
186    // stop boot animation
187    property_set("ctl.stop", "bootanim");
188}
189
190void SurfaceFlinger::binderDied(const wp<IBinder>& who)
191{
192    // the window manager died on us. prepare its eulogy.
193
194    // unfreeze the screen in case it was... frozen
195    mFreezeDisplayTime = 0;
196    mFreezeCount = 0;
197    mFreezeDisplay = false;
198
199    // reset screen orientation
200    setOrientation(0, eOrientationDefault, 0);
201
202    // restart the boot-animation
203    property_set("ctl.start", "bootanim");
204}
205
206void SurfaceFlinger::onFirstRef()
207{
208    run("SurfaceFlinger", PRIORITY_URGENT_DISPLAY);
209
210    // Wait for the main thread to be done with its initialization
211    mReadyToRunBarrier.wait();
212}
213
214static inline uint16_t pack565(int r, int g, int b) {
215    return (r<<11)|(g<<5)|b;
216}
217
218status_t SurfaceFlinger::readyToRun()
219{
220    LOGI(   "SurfaceFlinger's main thread ready to run. "
221            "Initializing graphics H/W...");
222
223    // we only support one display currently
224    int dpy = 0;
225
226    {
227        // initialize the main display
228        GraphicPlane& plane(graphicPlane(dpy));
229        DisplayHardware* const hw = new DisplayHardware(this, dpy);
230        plane.setDisplayHardware(hw);
231    }
232
233    // create the shared control-block
234    mServerHeap = new MemoryHeapBase(4096,
235            MemoryHeapBase::READ_ONLY, "SurfaceFlinger read-only heap");
236    LOGE_IF(mServerHeap==0, "can't create shared memory dealer");
237
238    mServerCblk = static_cast<surface_flinger_cblk_t*>(mServerHeap->getBase());
239    LOGE_IF(mServerCblk==0, "can't get to shared control block's address");
240
241    new(mServerCblk) surface_flinger_cblk_t;
242
243    // initialize primary screen
244    // (other display should be initialized in the same manner, but
245    // asynchronously, as they could come and go. None of this is supported
246    // yet).
247    const GraphicPlane& plane(graphicPlane(dpy));
248    const DisplayHardware& hw = plane.displayHardware();
249    const uint32_t w = hw.getWidth();
250    const uint32_t h = hw.getHeight();
251    const uint32_t f = hw.getFormat();
252    hw.makeCurrent();
253
254    // initialize the shared control block
255    mServerCblk->connected |= 1<<dpy;
256    display_cblk_t* dcblk = mServerCblk->displays + dpy;
257    memset(dcblk, 0, sizeof(display_cblk_t));
258    dcblk->w            = plane.getWidth();
259    dcblk->h            = plane.getHeight();
260    dcblk->format       = f;
261    dcblk->orientation  = ISurfaceComposer::eOrientationDefault;
262    dcblk->xdpi         = hw.getDpiX();
263    dcblk->ydpi         = hw.getDpiY();
264    dcblk->fps          = hw.getRefreshRate();
265    dcblk->density      = hw.getDensity();
266
267    // Initialize OpenGL|ES
268    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
269    glPixelStorei(GL_PACK_ALIGNMENT, 4);
270    glEnableClientState(GL_VERTEX_ARRAY);
271    glEnable(GL_SCISSOR_TEST);
272    glShadeModel(GL_FLAT);
273    glDisable(GL_DITHER);
274    glDisable(GL_CULL_FACE);
275
276    const uint16_t g0 = pack565(0x0F,0x1F,0x0F);
277    const uint16_t g1 = pack565(0x17,0x2f,0x17);
278    const uint16_t textureData[4] = { g0, g1, g1, g0 };
279    glGenTextures(1, &mWormholeTexName);
280    glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
281    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
282    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
283    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
284    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
285    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0,
286            GL_RGB, GL_UNSIGNED_SHORT_5_6_5, textureData);
287
288    glViewport(0, 0, w, h);
289    glMatrixMode(GL_PROJECTION);
290    glLoadIdentity();
291    // put the origin in the left-bottom corner
292    glOrthof(0, w, 0, h, 0, 1); // l=0, r=w ; b=0, t=h
293
294    mReadyToRunBarrier.open();
295
296    /*
297     *  We're now ready to accept clients...
298     */
299
300    // start boot animation
301    property_set("ctl.start", "bootanim");
302
303    return NO_ERROR;
304}
305
306// ----------------------------------------------------------------------------
307#if 0
308#pragma mark -
309#pragma mark Events Handler
310#endif
311
312void SurfaceFlinger::waitForEvent()
313{
314    while (true) {
315        nsecs_t timeout = -1;
316        const nsecs_t freezeDisplayTimeout = ms2ns(5000);
317        if (UNLIKELY(isFrozen())) {
318            // wait 5 seconds
319            const nsecs_t now = systemTime();
320            if (mFreezeDisplayTime == 0) {
321                mFreezeDisplayTime = now;
322            }
323            nsecs_t waitTime = freezeDisplayTimeout - (now - mFreezeDisplayTime);
324            timeout = waitTime>0 ? waitTime : 0;
325        }
326
327        sp<MessageBase> msg = mEventQueue.waitMessage(timeout);
328
329        // see if we timed out
330        if (isFrozen()) {
331            const nsecs_t now = systemTime();
332            nsecs_t frozenTime = (now - mFreezeDisplayTime);
333            if (frozenTime >= freezeDisplayTimeout) {
334                // we timed out and are still frozen
335                LOGW("timeout expired mFreezeDisplay=%d, mFreezeCount=%d",
336                        mFreezeDisplay, mFreezeCount);
337                mFreezeDisplayTime = 0;
338                mFreezeCount = 0;
339                mFreezeDisplay = false;
340            }
341        }
342
343        if (msg != 0) {
344            switch (msg->what) {
345                case MessageQueue::INVALIDATE:
346                    // invalidate message, just return to the main loop
347                    return;
348            }
349        }
350    }
351}
352
353void SurfaceFlinger::signalEvent() {
354    mEventQueue.invalidate();
355}
356
357bool SurfaceFlinger::authenticateSurfaceTexture(
358        const sp<ISurfaceTexture>& surfaceTexture) const {
359    Mutex::Autolock _l(mStateLock);
360    sp<IBinder> surfaceTextureBinder(surfaceTexture->asBinder());
361
362    // Check the visible layer list for the ISurface
363    const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
364    size_t count = currentLayers.size();
365    for (size_t i=0 ; i<count ; i++) {
366        const sp<LayerBase>& layer(currentLayers[i]);
367        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
368        if (lbc != NULL) {
369            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
370            if (lbcBinder == surfaceTextureBinder) {
371                return true;
372            }
373        }
374    }
375
376    // Check the layers in the purgatory.  This check is here so that if a
377    // SurfaceTexture gets destroyed before all the clients are done using it,
378    // the error will not be reported as "surface XYZ is not authenticated", but
379    // will instead fail later on when the client tries to use the surface,
380    // which should be reported as "surface XYZ returned an -ENODEV".  The
381    // purgatorized layers are no less authentic than the visible ones, so this
382    // should not cause any harm.
383    size_t purgatorySize =  mLayerPurgatory.size();
384    for (size_t i=0 ; i<purgatorySize ; i++) {
385        const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
386        sp<LayerBaseClient> lbc(layer->getLayerBaseClient());
387        if (lbc != NULL) {
388            wp<IBinder> lbcBinder = lbc->getSurfaceTextureBinder();
389            if (lbcBinder == surfaceTextureBinder) {
390                return true;
391            }
392        }
393    }
394
395    return false;
396}
397
398status_t SurfaceFlinger::postMessageAsync(const sp<MessageBase>& msg,
399        nsecs_t reltime, uint32_t flags)
400{
401    return mEventQueue.postMessage(msg, reltime, flags);
402}
403
404status_t SurfaceFlinger::postMessageSync(const sp<MessageBase>& msg,
405        nsecs_t reltime, uint32_t flags)
406{
407    status_t res = mEventQueue.postMessage(msg, reltime, flags);
408    if (res == NO_ERROR) {
409        msg->wait();
410    }
411    return res;
412}
413
414// ----------------------------------------------------------------------------
415#if 0
416#pragma mark -
417#pragma mark Main loop
418#endif
419
420bool SurfaceFlinger::threadLoop()
421{
422    waitForEvent();
423
424    // check for transactions
425    if (UNLIKELY(mConsoleSignals)) {
426        handleConsoleEvents();
427    }
428
429    // if we're in a global transaction, don't do anything.
430    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
431    uint32_t transactionFlags = peekTransactionFlags(mask);
432    if (UNLIKELY(transactionFlags)) {
433        handleTransaction(transactionFlags);
434    }
435
436    // post surfaces (if needed)
437    handlePageFlip();
438
439    if (UNLIKELY(mHwWorkListDirty)) {
440        // build the h/w work list
441        handleWorkList();
442    }
443
444    const DisplayHardware& hw(graphicPlane(0).displayHardware());
445    if (LIKELY(hw.canDraw() && !isFrozen())) {
446        // repaint the framebuffer (if needed)
447
448        const int index = hw.getCurrentBufferIndex();
449        GraphicLog& logger(GraphicLog::getInstance());
450
451        logger.log(GraphicLog::SF_REPAINT, index);
452        handleRepaint();
453
454        // inform the h/w that we're done compositing
455        logger.log(GraphicLog::SF_COMPOSITION_COMPLETE, index);
456        hw.compositionComplete();
457
458        logger.log(GraphicLog::SF_SWAP_BUFFERS, index);
459        postFramebuffer();
460
461        logger.log(GraphicLog::SF_REPAINT_DONE, index);
462    } else {
463        // pretend we did the post
464        hw.compositionComplete();
465        usleep(16667); // 60 fps period
466    }
467    return true;
468}
469
470void SurfaceFlinger::postFramebuffer()
471{
472    if (!mSwapRegion.isEmpty()) {
473        const DisplayHardware& hw(graphicPlane(0).displayHardware());
474        const nsecs_t now = systemTime();
475        mDebugInSwapBuffers = now;
476        hw.flip(mSwapRegion);
477        mLastSwapBufferTime = systemTime() - now;
478        mDebugInSwapBuffers = 0;
479        mSwapRegion.clear();
480    }
481}
482
483void SurfaceFlinger::handleConsoleEvents()
484{
485    // something to do with the console
486    const DisplayHardware& hw = graphicPlane(0).displayHardware();
487
488    int what = android_atomic_and(0, &mConsoleSignals);
489    if (what & eConsoleAcquired) {
490        hw.acquireScreen();
491        // this is a temporary work-around, eventually this should be called
492        // by the power-manager
493        SurfaceFlinger::turnElectronBeamOn(mElectronBeamAnimationMode);
494    }
495
496    if (mDeferReleaseConsole && hw.isScreenAcquired()) {
497        // We got the release signal before the acquire signal
498        mDeferReleaseConsole = false;
499        hw.releaseScreen();
500    }
501
502    if (what & eConsoleReleased) {
503        if (hw.isScreenAcquired()) {
504            hw.releaseScreen();
505        } else {
506            mDeferReleaseConsole = true;
507        }
508    }
509
510    mDirtyRegion.set(hw.bounds());
511}
512
513void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
514{
515    Mutex::Autolock _l(mStateLock);
516    const nsecs_t now = systemTime();
517    mDebugInTransaction = now;
518
519    // Here we're guaranteed that some transaction flags are set
520    // so we can call handleTransactionLocked() unconditionally.
521    // We call getTransactionFlags(), which will also clear the flags,
522    // with mStateLock held to guarantee that mCurrentState won't change
523    // until the transaction is committed.
524
525    const uint32_t mask = eTransactionNeeded | eTraversalNeeded;
526    transactionFlags = getTransactionFlags(mask);
527    handleTransactionLocked(transactionFlags);
528
529    mLastTransactionTime = systemTime() - now;
530    mDebugInTransaction = 0;
531    invalidateHwcGeometry();
532    // here the transaction has been committed
533}
534
535void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
536{
537    const LayerVector& currentLayers(mCurrentState.layersSortedByZ);
538    const size_t count = currentLayers.size();
539
540    /*
541     * Traversal of the children
542     * (perform the transaction for each of them if needed)
543     */
544
545    const bool layersNeedTransaction = transactionFlags & eTraversalNeeded;
546    if (layersNeedTransaction) {
547        for (size_t i=0 ; i<count ; i++) {
548            const sp<LayerBase>& layer = currentLayers[i];
549            uint32_t trFlags = layer->getTransactionFlags(eTransactionNeeded);
550            if (!trFlags) continue;
551
552            const uint32_t flags = layer->doTransaction(0);
553            if (flags & Layer::eVisibleRegion)
554                mVisibleRegionsDirty = true;
555        }
556    }
557
558    /*
559     * Perform our own transaction if needed
560     */
561
562    if (transactionFlags & eTransactionNeeded) {
563        if (mCurrentState.orientation != mDrawingState.orientation) {
564            // the orientation has changed, recompute all visible regions
565            // and invalidate everything.
566
567            const int dpy = 0;
568            const int orientation = mCurrentState.orientation;
569            const uint32_t type = mCurrentState.orientationType;
570            GraphicPlane& plane(graphicPlane(dpy));
571            plane.setOrientation(orientation);
572
573            // update the shared control block
574            const DisplayHardware& hw(plane.displayHardware());
575            volatile display_cblk_t* dcblk = mServerCblk->displays + dpy;
576            dcblk->orientation = orientation;
577            dcblk->w = plane.getWidth();
578            dcblk->h = plane.getHeight();
579
580            mVisibleRegionsDirty = true;
581            mDirtyRegion.set(hw.bounds());
582        }
583
584        if (mCurrentState.freezeDisplay != mDrawingState.freezeDisplay) {
585            // freezing or unfreezing the display -> trigger animation if needed
586            mFreezeDisplay = mCurrentState.freezeDisplay;
587            if (mFreezeDisplay)
588                 mFreezeDisplayTime = 0;
589        }
590
591        if (currentLayers.size() > mDrawingState.layersSortedByZ.size()) {
592            // layers have been added
593            mVisibleRegionsDirty = true;
594        }
595
596        // some layers might have been removed, so
597        // we need to update the regions they're exposing.
598        if (mLayersRemoved) {
599            mLayersRemoved = false;
600            mVisibleRegionsDirty = true;
601            const LayerVector& previousLayers(mDrawingState.layersSortedByZ);
602            const size_t count = previousLayers.size();
603            for (size_t i=0 ; i<count ; i++) {
604                const sp<LayerBase>& layer(previousLayers[i]);
605                if (currentLayers.indexOf( layer ) < 0) {
606                    // this layer is not visible anymore
607                    mDirtyRegionRemovedLayer.orSelf(layer->visibleRegionScreen);
608                }
609            }
610        }
611    }
612
613    commitTransaction();
614}
615
616sp<FreezeLock> SurfaceFlinger::getFreezeLock() const
617{
618    return new FreezeLock(const_cast<SurfaceFlinger *>(this));
619}
620
621void SurfaceFlinger::computeVisibleRegions(
622    const LayerVector& currentLayers, Region& dirtyRegion, Region& opaqueRegion)
623{
624    const GraphicPlane& plane(graphicPlane(0));
625    const Transform& planeTransform(plane.transform());
626    const DisplayHardware& hw(plane.displayHardware());
627    const Region screenRegion(hw.bounds());
628
629    Region aboveOpaqueLayers;
630    Region aboveCoveredLayers;
631    Region dirty;
632
633    bool secureFrameBuffer = false;
634
635    size_t i = currentLayers.size();
636    while (i--) {
637        const sp<LayerBase>& layer = currentLayers[i];
638        layer->validateVisibility(planeTransform);
639
640        // start with the whole surface at its current location
641        const Layer::State& s(layer->drawingState());
642
643        /*
644         * opaqueRegion: area of a surface that is fully opaque.
645         */
646        Region opaqueRegion;
647
648        /*
649         * visibleRegion: area of a surface that is visible on screen
650         * and not fully transparent. This is essentially the layer's
651         * footprint minus the opaque regions above it.
652         * Areas covered by a translucent surface are considered visible.
653         */
654        Region visibleRegion;
655
656        /*
657         * coveredRegion: area of a surface that is covered by all
658         * visible regions above it (which includes the translucent areas).
659         */
660        Region coveredRegion;
661
662
663        // handle hidden surfaces by setting the visible region to empty
664        if (LIKELY(!(s.flags & ISurfaceComposer::eLayerHidden) && s.alpha)) {
665            const bool translucent = !layer->isOpaque();
666            const Rect bounds(layer->visibleBounds());
667            visibleRegion.set(bounds);
668            visibleRegion.andSelf(screenRegion);
669            if (!visibleRegion.isEmpty()) {
670                // Remove the transparent area from the visible region
671                if (translucent) {
672                    visibleRegion.subtractSelf(layer->transparentRegionScreen);
673                }
674
675                // compute the opaque region
676                const int32_t layerOrientation = layer->getOrientation();
677                if (s.alpha==255 && !translucent &&
678                        ((layerOrientation & Transform::ROT_INVALID) == false)) {
679                    // the opaque region is the layer's footprint
680                    opaqueRegion = visibleRegion;
681                }
682            }
683        }
684
685        // Clip the covered region to the visible region
686        coveredRegion = aboveCoveredLayers.intersect(visibleRegion);
687
688        // Update aboveCoveredLayers for next (lower) layer
689        aboveCoveredLayers.orSelf(visibleRegion);
690
691        // subtract the opaque region covered by the layers above us
692        visibleRegion.subtractSelf(aboveOpaqueLayers);
693
694        // compute this layer's dirty region
695        if (layer->contentDirty) {
696            // we need to invalidate the whole region
697            dirty = visibleRegion;
698            // as well, as the old visible region
699            dirty.orSelf(layer->visibleRegionScreen);
700            layer->contentDirty = false;
701        } else {
702            /* compute the exposed region:
703             *   the exposed region consists of two components:
704             *   1) what's VISIBLE now and was COVERED before
705             *   2) what's EXPOSED now less what was EXPOSED before
706             *
707             * note that (1) is conservative, we start with the whole
708             * visible region but only keep what used to be covered by
709             * something -- which mean it may have been exposed.
710             *
711             * (2) handles areas that were not covered by anything but got
712             * exposed because of a resize.
713             */
714            const Region newExposed = visibleRegion - coveredRegion;
715            const Region oldVisibleRegion = layer->visibleRegionScreen;
716            const Region oldCoveredRegion = layer->coveredRegionScreen;
717            const Region oldExposed = oldVisibleRegion - oldCoveredRegion;
718            dirty = (visibleRegion&oldCoveredRegion) | (newExposed-oldExposed);
719        }
720        dirty.subtractSelf(aboveOpaqueLayers);
721
722        // accumulate to the screen dirty region
723        dirtyRegion.orSelf(dirty);
724
725        // Update aboveOpaqueLayers for next (lower) layer
726        aboveOpaqueLayers.orSelf(opaqueRegion);
727
728        // Store the visible region is screen space
729        layer->setVisibleRegion(visibleRegion);
730        layer->setCoveredRegion(coveredRegion);
731
732        // If a secure layer is partially visible, lock-down the screen!
733        if (layer->isSecure() && !visibleRegion.isEmpty()) {
734            secureFrameBuffer = true;
735        }
736    }
737
738    // invalidate the areas where a layer was removed
739    dirtyRegion.orSelf(mDirtyRegionRemovedLayer);
740    mDirtyRegionRemovedLayer.clear();
741
742    mSecureFrameBuffer = secureFrameBuffer;
743    opaqueRegion = aboveOpaqueLayers;
744}
745
746
747void SurfaceFlinger::commitTransaction()
748{
749    mDrawingState = mCurrentState;
750    mResizeTransationPending = false;
751    mTransactionCV.broadcast();
752}
753
754void SurfaceFlinger::handlePageFlip()
755{
756    bool visibleRegions = mVisibleRegionsDirty;
757    const LayerVector& currentLayers(mDrawingState.layersSortedByZ);
758    visibleRegions |= lockPageFlip(currentLayers);
759
760        const DisplayHardware& hw = graphicPlane(0).displayHardware();
761        const Region screenRegion(hw.bounds());
762        if (visibleRegions) {
763            Region opaqueRegion;
764            computeVisibleRegions(currentLayers, mDirtyRegion, opaqueRegion);
765
766            /*
767             *  rebuild the visible layer list
768             */
769            const size_t count = currentLayers.size();
770            mVisibleLayersSortedByZ.clear();
771            mVisibleLayersSortedByZ.setCapacity(count);
772            for (size_t i=0 ; i<count ; i++) {
773                if (!currentLayers[i]->visibleRegionScreen.isEmpty())
774                    mVisibleLayersSortedByZ.add(currentLayers[i]);
775            }
776
777            mWormholeRegion = screenRegion.subtract(opaqueRegion);
778            mVisibleRegionsDirty = false;
779            invalidateHwcGeometry();
780        }
781
782    unlockPageFlip(currentLayers);
783    mDirtyRegion.andSelf(screenRegion);
784}
785
786void SurfaceFlinger::invalidateHwcGeometry()
787{
788    mHwWorkListDirty = true;
789}
790
791bool SurfaceFlinger::lockPageFlip(const LayerVector& currentLayers)
792{
793    bool recomputeVisibleRegions = false;
794    size_t count = currentLayers.size();
795    sp<LayerBase> const* layers = currentLayers.array();
796    for (size_t i=0 ; i<count ; i++) {
797        const sp<LayerBase>& layer(layers[i]);
798        layer->lockPageFlip(recomputeVisibleRegions);
799    }
800    return recomputeVisibleRegions;
801}
802
803void SurfaceFlinger::unlockPageFlip(const LayerVector& currentLayers)
804{
805    const GraphicPlane& plane(graphicPlane(0));
806    const Transform& planeTransform(plane.transform());
807    size_t count = currentLayers.size();
808    sp<LayerBase> const* layers = currentLayers.array();
809    for (size_t i=0 ; i<count ; i++) {
810        const sp<LayerBase>& layer(layers[i]);
811        layer->unlockPageFlip(planeTransform, mDirtyRegion);
812    }
813}
814
815void SurfaceFlinger::handleWorkList()
816{
817    mHwWorkListDirty = false;
818    HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
819    if (hwc.initCheck() == NO_ERROR) {
820        const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
821        const size_t count = currentLayers.size();
822        hwc.createWorkList(count);
823        hwc_layer_t* const cur(hwc.getLayers());
824        for (size_t i=0 ; cur && i<count ; i++) {
825            currentLayers[i]->setGeometry(&cur[i]);
826            if (mDebugDisableHWC || mDebugRegion) {
827                cur[i].compositionType = HWC_FRAMEBUFFER;
828                cur[i].flags |= HWC_SKIP_LAYER;
829            }
830        }
831    }
832}
833
834void SurfaceFlinger::handleRepaint()
835{
836    // compute the invalid region
837    mSwapRegion.orSelf(mDirtyRegion);
838
839    if (UNLIKELY(mDebugRegion)) {
840        debugFlashRegions();
841    }
842
843    // set the frame buffer
844    const DisplayHardware& hw(graphicPlane(0).displayHardware());
845    glMatrixMode(GL_MODELVIEW);
846    glLoadIdentity();
847
848    uint32_t flags = hw.getFlags();
849    if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
850        (flags & DisplayHardware::BUFFER_PRESERVED))
851    {
852        // we can redraw only what's dirty, but since SWAP_RECTANGLE only
853        // takes a rectangle, we must make sure to update that whole
854        // rectangle in that case
855        if (flags & DisplayHardware::SWAP_RECTANGLE) {
856            // TODO: we really should be able to pass a region to
857            // SWAP_RECTANGLE so that we don't have to redraw all this.
858            mDirtyRegion.set(mSwapRegion.bounds());
859        } else {
860            // in the BUFFER_PRESERVED case, obviously, we can update only
861            // what's needed and nothing more.
862            // NOTE: this is NOT a common case, as preserving the backbuffer
863            // is costly and usually involves copying the whole update back.
864        }
865    } else {
866        if (flags & DisplayHardware::PARTIAL_UPDATES) {
867            // We need to redraw the rectangle that will be updated
868            // (pushed to the framebuffer).
869            // This is needed because PARTIAL_UPDATES only takes one
870            // rectangle instead of a region (see DisplayHardware::flip())
871            mDirtyRegion.set(mSwapRegion.bounds());
872        } else {
873            // we need to redraw everything (the whole screen)
874            mDirtyRegion.set(hw.bounds());
875            mSwapRegion = mDirtyRegion;
876        }
877    }
878
879    setupHardwareComposer(mDirtyRegion);
880    composeSurfaces(mDirtyRegion);
881
882    // update the swap region and clear the dirty region
883    mSwapRegion.orSelf(mDirtyRegion);
884    mDirtyRegion.clear();
885}
886
887void SurfaceFlinger::setupHardwareComposer(Region& dirtyInOut)
888{
889    const DisplayHardware& hw(graphicPlane(0).displayHardware());
890    HWComposer& hwc(hw.getHwComposer());
891    hwc_layer_t* const cur(hwc.getLayers());
892    if (!cur) {
893        return;
894    }
895
896    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
897    size_t count = layers.size();
898
899    LOGE_IF(hwc.getNumLayers() != count,
900            "HAL number of layers (%d) doesn't match surfaceflinger (%d)",
901            hwc.getNumLayers(), count);
902
903    // just to be extra-safe, use the smallest count
904    if (hwc.initCheck() == NO_ERROR) {
905        count = count < hwc.getNumLayers() ? count : hwc.getNumLayers();
906    }
907
908    /*
909     *  update the per-frame h/w composer data for each layer
910     *  and build the transparent region of the FB
911     */
912    for (size_t i=0 ; i<count ; i++) {
913        const sp<LayerBase>& layer(layers[i]);
914        layer->setPerFrameData(&cur[i]);
915    }
916    const size_t fbLayerCount = hwc.getLayerCount(HWC_FRAMEBUFFER);
917    status_t err = hwc.prepare();
918    LOGE_IF(err, "HWComposer::prepare failed (%s)", strerror(-err));
919
920    if (err == NO_ERROR) {
921        // what's happening here is tricky.
922        // we want to clear all the layers with the CLEAR_FB flags
923        // that are opaque.
924        // however, since some GPU are efficient at preserving
925        // the backbuffer, we want to take advantage of that so we do the
926        // clear only in the dirty region (other areas will be preserved
927        // on those GPUs).
928        //   NOTE: on non backbuffer preserving GPU, the dirty region
929        //   has already been expanded as needed, so the code is correct
930        //   there too.
931        //
932        // However, the content of the framebuffer cannot be trusted when
933        // we switch to/from FB/OVERLAY, in which case we need to
934        // expand the dirty region to those areas too.
935        //
936        // Note also that there is a special case when switching from
937        // "no layers in FB" to "some layers in FB", where we need to redraw
938        // the entire FB, since some areas might contain uninitialized
939        // data.
940        //
941        // Also we want to make sure to not clear areas that belong to
942        // layers above that won't redraw (we would just erasing them),
943        // that is, we can't erase anything outside the dirty region.
944
945        Region transparent;
946
947        if (!fbLayerCount && hwc.getLayerCount(HWC_FRAMEBUFFER)) {
948            transparent.set(hw.getBounds());
949            dirtyInOut = transparent;
950        } else {
951            for (size_t i=0 ; i<count ; i++) {
952                const sp<LayerBase>& layer(layers[i]);
953                if ((cur[i].hints & HWC_HINT_CLEAR_FB) && layer->isOpaque()) {
954                    transparent.orSelf(layer->visibleRegionScreen);
955                }
956                bool isOverlay = (cur[i].compositionType != HWC_FRAMEBUFFER);
957                if (isOverlay != layer->isOverlay()) {
958                    // we transitioned to/from overlay, so add this layer
959                    // to the dirty region so the framebuffer can be either
960                    // cleared or redrawn.
961                    dirtyInOut.orSelf(layer->visibleRegionScreen);
962                }
963                layer->setOverlay(isOverlay);
964            }
965            // don't erase stuff outside the dirty region
966            transparent.andSelf(dirtyInOut);
967        }
968
969        /*
970         *  clear the area of the FB that need to be transparent
971         */
972        if (!transparent.isEmpty()) {
973            glClearColor(0,0,0,0);
974            Region::const_iterator it = transparent.begin();
975            Region::const_iterator const end = transparent.end();
976            const int32_t height = hw.getHeight();
977            while (it != end) {
978                const Rect& r(*it++);
979                const GLint sy = height - (r.top + r.height());
980                glScissor(r.left, sy, r.width(), r.height());
981                glClear(GL_COLOR_BUFFER_BIT);
982            }
983        }
984    }
985}
986
987void SurfaceFlinger::composeSurfaces(const Region& dirty)
988{
989    if (UNLIKELY(!mWormholeRegion.isEmpty())) {
990        // should never happen unless the window manager has a bug
991        // draw something...
992        drawWormhole();
993    }
994
995    const DisplayHardware& hw(graphicPlane(0).displayHardware());
996    HWComposer& hwc(hw.getHwComposer());
997    hwc_layer_t* const cur(hwc.getLayers());
998
999    /*
1000     * and then, render the layers targeted at the framebuffer
1001     */
1002    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1003    size_t count = layers.size();
1004    for (size_t i=0 ; i<count ; i++) {
1005        if (cur && (cur[i].compositionType != HWC_FRAMEBUFFER)) {
1006            continue;
1007        }
1008        const sp<LayerBase>& layer(layers[i]);
1009        const Region clip(dirty.intersect(layer->visibleRegionScreen));
1010        if (!clip.isEmpty()) {
1011            layer->draw(clip);
1012        }
1013    }
1014}
1015
1016void SurfaceFlinger::debugFlashRegions()
1017{
1018    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1019    const uint32_t flags = hw.getFlags();
1020    const int32_t height = hw.getHeight();
1021    if (mSwapRegion.isEmpty()) {
1022        return;
1023    }
1024
1025    if (!((flags & DisplayHardware::SWAP_RECTANGLE) ||
1026            (flags & DisplayHardware::BUFFER_PRESERVED))) {
1027        const Region repaint((flags & DisplayHardware::PARTIAL_UPDATES) ?
1028                mDirtyRegion.bounds() : hw.bounds());
1029        composeSurfaces(repaint);
1030    }
1031
1032    glDisable(GL_BLEND);
1033    glDisable(GL_DITHER);
1034    glDisable(GL_SCISSOR_TEST);
1035
1036    static int toggle = 0;
1037    toggle = 1 - toggle;
1038    if (toggle) {
1039        glColor4f(1, 0, 1, 1);
1040    } else {
1041        glColor4f(1, 1, 0, 1);
1042    }
1043
1044    Region::const_iterator it = mDirtyRegion.begin();
1045    Region::const_iterator const end = mDirtyRegion.end();
1046    while (it != end) {
1047        const Rect& r = *it++;
1048        GLfloat vertices[][2] = {
1049                { r.left,  height - r.top },
1050                { r.left,  height - r.bottom },
1051                { r.right, height - r.bottom },
1052                { r.right, height - r.top }
1053        };
1054        glVertexPointer(2, GL_FLOAT, 0, vertices);
1055        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1056    }
1057
1058    hw.flip(mSwapRegion);
1059
1060    if (mDebugRegion > 1)
1061        usleep(mDebugRegion * 1000);
1062
1063    glEnable(GL_SCISSOR_TEST);
1064}
1065
1066void SurfaceFlinger::drawWormhole() const
1067{
1068    const Region region(mWormholeRegion.intersect(mDirtyRegion));
1069    if (region.isEmpty())
1070        return;
1071
1072    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1073    const int32_t width = hw.getWidth();
1074    const int32_t height = hw.getHeight();
1075
1076    glDisable(GL_BLEND);
1077    glDisable(GL_DITHER);
1078
1079    if (LIKELY(!mDebugBackground)) {
1080        glClearColor(0,0,0,0);
1081        Region::const_iterator it = region.begin();
1082        Region::const_iterator const end = region.end();
1083        while (it != end) {
1084            const Rect& r = *it++;
1085            const GLint sy = height - (r.top + r.height());
1086            glScissor(r.left, sy, r.width(), r.height());
1087            glClear(GL_COLOR_BUFFER_BIT);
1088        }
1089    } else {
1090        const GLshort vertices[][2] = { { 0, 0 }, { width, 0 },
1091                { width, height }, { 0, height }  };
1092        const GLshort tcoords[][2] = { { 0, 0 }, { 1, 0 },  { 1, 1 }, { 0, 1 } };
1093        glVertexPointer(2, GL_SHORT, 0, vertices);
1094        glTexCoordPointer(2, GL_SHORT, 0, tcoords);
1095        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1096#if defined(GL_OES_EGL_image_external)
1097        if (GLExtensions::getInstance().haveTextureExternal()) {
1098            glDisable(GL_TEXTURE_EXTERNAL_OES);
1099        }
1100#endif
1101        glEnable(GL_TEXTURE_2D);
1102        glBindTexture(GL_TEXTURE_2D, mWormholeTexName);
1103        glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1104        glMatrixMode(GL_TEXTURE);
1105        glLoadIdentity();
1106        glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
1107        Region::const_iterator it = region.begin();
1108        Region::const_iterator const end = region.end();
1109        while (it != end) {
1110            const Rect& r = *it++;
1111            const GLint sy = height - (r.top + r.height());
1112            glScissor(r.left, sy, r.width(), r.height());
1113            glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1114        }
1115        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1116        glDisable(GL_TEXTURE_2D);
1117        glLoadIdentity();
1118        glMatrixMode(GL_MODELVIEW);
1119    }
1120}
1121
1122void SurfaceFlinger::debugShowFPS() const
1123{
1124    static int mFrameCount;
1125    static int mLastFrameCount = 0;
1126    static nsecs_t mLastFpsTime = 0;
1127    static float mFps = 0;
1128    mFrameCount++;
1129    nsecs_t now = systemTime();
1130    nsecs_t diff = now - mLastFpsTime;
1131    if (diff > ms2ns(250)) {
1132        mFps =  ((mFrameCount - mLastFrameCount) * float(s2ns(1))) / diff;
1133        mLastFpsTime = now;
1134        mLastFrameCount = mFrameCount;
1135    }
1136    // XXX: mFPS has the value we want
1137 }
1138
1139status_t SurfaceFlinger::addLayer(const sp<LayerBase>& layer)
1140{
1141    Mutex::Autolock _l(mStateLock);
1142    addLayer_l(layer);
1143    setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1144    return NO_ERROR;
1145}
1146
1147status_t SurfaceFlinger::addLayer_l(const sp<LayerBase>& layer)
1148{
1149    ssize_t i = mCurrentState.layersSortedByZ.add(layer);
1150    return (i < 0) ? status_t(i) : status_t(NO_ERROR);
1151}
1152
1153ssize_t SurfaceFlinger::addClientLayer(const sp<Client>& client,
1154        const sp<LayerBaseClient>& lbc)
1155{
1156    // attach this layer to the client
1157    size_t name = client->attachLayer(lbc);
1158
1159    Mutex::Autolock _l(mStateLock);
1160
1161    // add this layer to the current state list
1162    addLayer_l(lbc);
1163
1164    return ssize_t(name);
1165}
1166
1167status_t SurfaceFlinger::removeLayer(const sp<LayerBase>& layer)
1168{
1169    Mutex::Autolock _l(mStateLock);
1170    status_t err = purgatorizeLayer_l(layer);
1171    if (err == NO_ERROR)
1172        setTransactionFlags(eTransactionNeeded);
1173    return err;
1174}
1175
1176status_t SurfaceFlinger::removeLayer_l(const sp<LayerBase>& layerBase)
1177{
1178    sp<LayerBaseClient> lbc(layerBase->getLayerBaseClient());
1179    if (lbc != 0) {
1180        mLayerMap.removeItem( lbc->getSurfaceBinder() );
1181    }
1182    ssize_t index = mCurrentState.layersSortedByZ.remove(layerBase);
1183    if (index >= 0) {
1184        mLayersRemoved = true;
1185        return NO_ERROR;
1186    }
1187    return status_t(index);
1188}
1189
1190status_t SurfaceFlinger::purgatorizeLayer_l(const sp<LayerBase>& layerBase)
1191{
1192    // First add the layer to the purgatory list, which makes sure it won't
1193    // go away, then remove it from the main list (through a transaction).
1194    ssize_t err = removeLayer_l(layerBase);
1195    if (err >= 0) {
1196        mLayerPurgatory.add(layerBase);
1197    }
1198
1199    layerBase->onRemoved();
1200
1201    // it's possible that we don't find a layer, because it might
1202    // have been destroyed already -- this is not technically an error
1203    // from the user because there is a race between Client::destroySurface(),
1204    // ~Client() and ~ISurface().
1205    return (err == NAME_NOT_FOUND) ? status_t(NO_ERROR) : err;
1206}
1207
1208status_t SurfaceFlinger::invalidateLayerVisibility(const sp<LayerBase>& layer)
1209{
1210    layer->forceVisibilityTransaction();
1211    setTransactionFlags(eTraversalNeeded);
1212    return NO_ERROR;
1213}
1214
1215uint32_t SurfaceFlinger::peekTransactionFlags(uint32_t flags)
1216{
1217    return android_atomic_release_load(&mTransactionFlags);
1218}
1219
1220uint32_t SurfaceFlinger::getTransactionFlags(uint32_t flags)
1221{
1222    return android_atomic_and(~flags, &mTransactionFlags) & flags;
1223}
1224
1225uint32_t SurfaceFlinger::setTransactionFlags(uint32_t flags)
1226{
1227    uint32_t old = android_atomic_or(flags, &mTransactionFlags);
1228    if ((old & flags)==0) { // wake the server up
1229        signalEvent();
1230    }
1231    return old;
1232}
1233
1234
1235void SurfaceFlinger::setTransactionState(const Vector<ComposerState>& state) {
1236    Mutex::Autolock _l(mStateLock);
1237
1238    uint32_t flags = 0;
1239    const size_t count = state.size();
1240    for (size_t i=0 ; i<count ; i++) {
1241        const ComposerState& s(state[i]);
1242        sp<Client> client( static_cast<Client *>(s.client.get()) );
1243        flags |= setClientStateLocked(client, s.state);
1244    }
1245    if (flags) {
1246        setTransactionFlags(flags);
1247    }
1248
1249    signalEvent();
1250
1251    // if there is a transaction with a resize, wait for it to
1252    // take effect before returning.
1253    while (mResizeTransationPending) {
1254        status_t err = mTransactionCV.waitRelative(mStateLock, s2ns(5));
1255        if (CC_UNLIKELY(err != NO_ERROR)) {
1256            // just in case something goes wrong in SF, return to the
1257            // called after a few seconds.
1258            LOGW_IF(err == TIMED_OUT, "closeGlobalTransaction timed out!");
1259            mResizeTransationPending = false;
1260            break;
1261        }
1262    }
1263}
1264
1265status_t SurfaceFlinger::freezeDisplay(DisplayID dpy, uint32_t flags)
1266{
1267    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1268        return BAD_VALUE;
1269
1270    Mutex::Autolock _l(mStateLock);
1271    mCurrentState.freezeDisplay = 1;
1272    setTransactionFlags(eTransactionNeeded);
1273
1274    // flags is intended to communicate some sort of animation behavior
1275    // (for instance fading)
1276    return NO_ERROR;
1277}
1278
1279status_t SurfaceFlinger::unfreezeDisplay(DisplayID dpy, uint32_t flags)
1280{
1281    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1282        return BAD_VALUE;
1283
1284    Mutex::Autolock _l(mStateLock);
1285    mCurrentState.freezeDisplay = 0;
1286    setTransactionFlags(eTransactionNeeded);
1287
1288    // flags is intended to communicate some sort of animation behavior
1289    // (for instance fading)
1290    return NO_ERROR;
1291}
1292
1293int SurfaceFlinger::setOrientation(DisplayID dpy,
1294        int orientation, uint32_t flags)
1295{
1296    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
1297        return BAD_VALUE;
1298
1299    Mutex::Autolock _l(mStateLock);
1300    if (mCurrentState.orientation != orientation) {
1301        if (uint32_t(orientation)<=eOrientation270 || orientation==42) {
1302            mCurrentState.orientationType = flags;
1303            mCurrentState.orientation = orientation;
1304            setTransactionFlags(eTransactionNeeded);
1305            mTransactionCV.wait(mStateLock);
1306        } else {
1307            orientation = BAD_VALUE;
1308        }
1309    }
1310    return orientation;
1311}
1312
1313sp<ISurface> SurfaceFlinger::createSurface(
1314        ISurfaceComposerClient::surface_data_t* params,
1315        const String8& name,
1316        const sp<Client>& client,
1317        DisplayID d, uint32_t w, uint32_t h, PixelFormat format,
1318        uint32_t flags)
1319{
1320    sp<LayerBaseClient> layer;
1321    sp<ISurface> surfaceHandle;
1322
1323    if (int32_t(w|h) < 0) {
1324        LOGE("createSurface() failed, w or h is negative (w=%d, h=%d)",
1325                int(w), int(h));
1326        return surfaceHandle;
1327    }
1328
1329    //LOGD("createSurface for pid %d (%d x %d)", pid, w, h);
1330    sp<Layer> normalLayer;
1331    switch (flags & eFXSurfaceMask) {
1332        case eFXSurfaceNormal:
1333            normalLayer = createNormalSurface(client, d, w, h, flags, format);
1334            layer = normalLayer;
1335            break;
1336        case eFXSurfaceBlur:
1337            // for now we treat Blur as Dim, until we can implement it
1338            // efficiently.
1339        case eFXSurfaceDim:
1340            layer = createDimSurface(client, d, w, h, flags);
1341            break;
1342    }
1343
1344    if (layer != 0) {
1345        layer->initStates(w, h, flags);
1346        layer->setName(name);
1347        ssize_t token = addClientLayer(client, layer);
1348
1349        surfaceHandle = layer->getSurface();
1350        if (surfaceHandle != 0) {
1351            params->token = token;
1352            params->identity = layer->getIdentity();
1353            if (normalLayer != 0) {
1354                Mutex::Autolock _l(mStateLock);
1355                mLayerMap.add(layer->getSurfaceBinder(), normalLayer);
1356            }
1357        }
1358
1359        setTransactionFlags(eTransactionNeeded);
1360    }
1361
1362    return surfaceHandle;
1363}
1364
1365sp<Layer> SurfaceFlinger::createNormalSurface(
1366        const sp<Client>& client, DisplayID display,
1367        uint32_t w, uint32_t h, uint32_t flags,
1368        PixelFormat& format)
1369{
1370    // initialize the surfaces
1371    switch (format) { // TODO: take h/w into account
1372    case PIXEL_FORMAT_TRANSPARENT:
1373    case PIXEL_FORMAT_TRANSLUCENT:
1374        format = PIXEL_FORMAT_RGBA_8888;
1375        break;
1376    case PIXEL_FORMAT_OPAQUE:
1377#ifdef NO_RGBX_8888
1378        format = PIXEL_FORMAT_RGB_565;
1379#else
1380        format = PIXEL_FORMAT_RGBX_8888;
1381#endif
1382        break;
1383    }
1384
1385#ifdef NO_RGBX_8888
1386    if (format == PIXEL_FORMAT_RGBX_8888)
1387        format = PIXEL_FORMAT_RGBA_8888;
1388#endif
1389
1390    sp<Layer> layer = new Layer(this, display, client);
1391    status_t err = layer->setBuffers(w, h, format, flags);
1392    if (LIKELY(err != NO_ERROR)) {
1393        LOGE("createNormalSurfaceLocked() failed (%s)", strerror(-err));
1394        layer.clear();
1395    }
1396    return layer;
1397}
1398
1399sp<LayerDim> SurfaceFlinger::createDimSurface(
1400        const sp<Client>& client, DisplayID display,
1401        uint32_t w, uint32_t h, uint32_t flags)
1402{
1403    sp<LayerDim> layer = new LayerDim(this, display, client);
1404    layer->initStates(w, h, flags);
1405    return layer;
1406}
1407
1408status_t SurfaceFlinger::removeSurface(const sp<Client>& client, SurfaceID sid)
1409{
1410    /*
1411     * called by the window manager, when a surface should be marked for
1412     * destruction.
1413     *
1414     * The surface is removed from the current and drawing lists, but placed
1415     * in the purgatory queue, so it's not destroyed right-away (we need
1416     * to wait for all client's references to go away first).
1417     */
1418
1419    status_t err = NAME_NOT_FOUND;
1420    Mutex::Autolock _l(mStateLock);
1421    sp<LayerBaseClient> layer = client->getLayerUser(sid);
1422    if (layer != 0) {
1423        err = purgatorizeLayer_l(layer);
1424        if (err == NO_ERROR) {
1425            setTransactionFlags(eTransactionNeeded);
1426        }
1427    }
1428    return err;
1429}
1430
1431status_t SurfaceFlinger::destroySurface(const wp<LayerBaseClient>& layer)
1432{
1433    // called by ~ISurface() when all references are gone
1434    status_t err = NO_ERROR;
1435    sp<LayerBaseClient> l(layer.promote());
1436    if (l != NULL) {
1437        Mutex::Autolock _l(mStateLock);
1438        err = removeLayer_l(l);
1439        if (err == NAME_NOT_FOUND) {
1440            // The surface wasn't in the current list, which means it was
1441            // removed already, which means it is in the purgatory,
1442            // and need to be removed from there.
1443            ssize_t idx = mLayerPurgatory.remove(l);
1444            LOGE_IF(idx < 0,
1445                    "layer=%p is not in the purgatory list", l.get());
1446        }
1447        LOGE_IF(err<0 && err != NAME_NOT_FOUND,
1448                "error removing layer=%p (%s)", l.get(), strerror(-err));
1449    }
1450    return err;
1451}
1452
1453uint32_t SurfaceFlinger::setClientStateLocked(
1454        const sp<Client>& client,
1455        const layer_state_t& s)
1456{
1457    uint32_t flags = 0;
1458    sp<LayerBaseClient> layer(client->getLayerUser(s.surface));
1459    if (layer != 0) {
1460        const uint32_t what = s.what;
1461        if (what & ePositionChanged) {
1462            if (layer->setPosition(s.x, s.y))
1463                flags |= eTraversalNeeded;
1464        }
1465        if (what & eLayerChanged) {
1466            ssize_t idx = mCurrentState.layersSortedByZ.indexOf(layer);
1467            if (layer->setLayer(s.z)) {
1468                mCurrentState.layersSortedByZ.removeAt(idx);
1469                mCurrentState.layersSortedByZ.add(layer);
1470                // we need traversal (state changed)
1471                // AND transaction (list changed)
1472                flags |= eTransactionNeeded|eTraversalNeeded;
1473            }
1474        }
1475        if (what & eSizeChanged) {
1476            if (layer->setSize(s.w, s.h)) {
1477                flags |= eTraversalNeeded;
1478                mResizeTransationPending = true;
1479            }
1480        }
1481        if (what & eAlphaChanged) {
1482            if (layer->setAlpha(uint8_t(255.0f*s.alpha+0.5f)))
1483                flags |= eTraversalNeeded;
1484        }
1485        if (what & eMatrixChanged) {
1486            if (layer->setMatrix(s.matrix))
1487                flags |= eTraversalNeeded;
1488        }
1489        if (what & eTransparentRegionChanged) {
1490            if (layer->setTransparentRegionHint(s.transparentRegion))
1491                flags |= eTraversalNeeded;
1492        }
1493        if (what & eVisibilityChanged) {
1494            if (layer->setFlags(s.flags, s.mask))
1495                flags |= eTraversalNeeded;
1496        }
1497    }
1498    return flags;
1499}
1500
1501void SurfaceFlinger::screenReleased(int dpy)
1502{
1503    // this may be called by a signal handler, we can't do too much in here
1504    android_atomic_or(eConsoleReleased, &mConsoleSignals);
1505    signalEvent();
1506}
1507
1508void SurfaceFlinger::screenAcquired(int dpy)
1509{
1510    // this may be called by a signal handler, we can't do too much in here
1511    android_atomic_or(eConsoleAcquired, &mConsoleSignals);
1512    signalEvent();
1513}
1514
1515status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
1516{
1517    const size_t SIZE = 4096;
1518    char buffer[SIZE];
1519    String8 result;
1520
1521    if (!PermissionCache::checkCallingPermission(sDump)) {
1522        snprintf(buffer, SIZE, "Permission Denial: "
1523                "can't dump SurfaceFlinger from pid=%d, uid=%d\n",
1524                IPCThreadState::self()->getCallingPid(),
1525                IPCThreadState::self()->getCallingUid());
1526        result.append(buffer);
1527    } else {
1528
1529        // figure out if we're stuck somewhere
1530        const nsecs_t now = systemTime();
1531        const nsecs_t inSwapBuffers(mDebugInSwapBuffers);
1532        const nsecs_t inTransaction(mDebugInTransaction);
1533        nsecs_t inSwapBuffersDuration = (inSwapBuffers) ? now-inSwapBuffers : 0;
1534        nsecs_t inTransactionDuration = (inTransaction) ? now-inTransaction : 0;
1535
1536        // Try to get the main lock, but don't insist if we can't
1537        // (this would indicate SF is stuck, but we want to be able to
1538        // print something in dumpsys).
1539        int retry = 3;
1540        while (mStateLock.tryLock()<0 && --retry>=0) {
1541            usleep(1000000);
1542        }
1543        const bool locked(retry >= 0);
1544        if (!locked) {
1545            snprintf(buffer, SIZE,
1546                    "SurfaceFlinger appears to be unresponsive, "
1547                    "dumping anyways (no locks held)\n");
1548            result.append(buffer);
1549        }
1550
1551        /*
1552         * Dump the visible layer list
1553         */
1554        const LayerVector& currentLayers = mCurrentState.layersSortedByZ;
1555        const size_t count = currentLayers.size();
1556        snprintf(buffer, SIZE, "Visible layers (count = %d)\n", count);
1557        result.append(buffer);
1558        for (size_t i=0 ; i<count ; i++) {
1559            const sp<LayerBase>& layer(currentLayers[i]);
1560            layer->dump(result, buffer, SIZE);
1561            const Layer::State& s(layer->drawingState());
1562            s.transparentRegion.dump(result, "transparentRegion");
1563            layer->transparentRegionScreen.dump(result, "transparentRegionScreen");
1564            layer->visibleRegionScreen.dump(result, "visibleRegionScreen");
1565        }
1566
1567        /*
1568         * Dump the layers in the purgatory
1569         */
1570
1571        const size_t purgatorySize =  mLayerPurgatory.size();
1572        snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
1573        result.append(buffer);
1574        for (size_t i=0 ; i<purgatorySize ; i++) {
1575            const sp<LayerBase>& layer(mLayerPurgatory.itemAt(i));
1576            layer->shortDump(result, buffer, SIZE);
1577        }
1578
1579        /*
1580         * Dump SurfaceFlinger global state
1581         */
1582
1583        snprintf(buffer, SIZE, "SurfaceFlinger global state:\n");
1584        result.append(buffer);
1585
1586        const GLExtensions& extensions(GLExtensions::getInstance());
1587        snprintf(buffer, SIZE, "GLES: %s, %s, %s\n",
1588                extensions.getVendor(),
1589                extensions.getRenderer(),
1590                extensions.getVersion());
1591        result.append(buffer);
1592        snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
1593        result.append(buffer);
1594
1595        mWormholeRegion.dump(result, "WormholeRegion");
1596        const DisplayHardware& hw(graphicPlane(0).displayHardware());
1597        snprintf(buffer, SIZE,
1598                "  display frozen: %s, freezeCount=%d, orientation=%d, canDraw=%d\n",
1599                mFreezeDisplay?"yes":"no", mFreezeCount,
1600                mCurrentState.orientation, hw.canDraw());
1601        result.append(buffer);
1602        snprintf(buffer, SIZE,
1603                "  last eglSwapBuffers() time: %f us\n"
1604                "  last transaction time     : %f us\n",
1605                mLastSwapBufferTime/1000.0, mLastTransactionTime/1000.0);
1606        result.append(buffer);
1607
1608        if (inSwapBuffersDuration || !locked) {
1609            snprintf(buffer, SIZE, "  eglSwapBuffers time: %f us\n",
1610                    inSwapBuffersDuration/1000.0);
1611            result.append(buffer);
1612        }
1613
1614        if (inTransactionDuration || !locked) {
1615            snprintf(buffer, SIZE, "  transaction time: %f us\n",
1616                    inTransactionDuration/1000.0);
1617            result.append(buffer);
1618        }
1619
1620        /*
1621         * Dump HWComposer state
1622         */
1623        HWComposer& hwc(hw.getHwComposer());
1624        snprintf(buffer, SIZE, "  h/w composer %s and %s\n",
1625                hwc.initCheck()==NO_ERROR ? "present" : "not present",
1626                (mDebugDisableHWC || mDebugRegion) ? "disabled" : "enabled");
1627        result.append(buffer);
1628        hwc.dump(result, buffer, SIZE, mVisibleLayersSortedByZ);
1629
1630        /*
1631         * Dump gralloc state
1632         */
1633        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
1634        alloc.dump(result);
1635        hw.dump(result);
1636
1637        if (locked) {
1638            mStateLock.unlock();
1639        }
1640    }
1641    write(fd, result.string(), result.size());
1642    return NO_ERROR;
1643}
1644
1645status_t SurfaceFlinger::onTransact(
1646    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
1647{
1648    switch (code) {
1649        case CREATE_CONNECTION:
1650        case SET_TRANSACTION_STATE:
1651        case SET_ORIENTATION:
1652        case FREEZE_DISPLAY:
1653        case UNFREEZE_DISPLAY:
1654        case BOOT_FINISHED:
1655        case TURN_ELECTRON_BEAM_OFF:
1656        case TURN_ELECTRON_BEAM_ON:
1657        {
1658            // codes that require permission check
1659            IPCThreadState* ipc = IPCThreadState::self();
1660            const int pid = ipc->getCallingPid();
1661            const int uid = ipc->getCallingUid();
1662            if ((uid != AID_GRAPHICS) &&
1663                    !PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
1664                LOGE("Permission Denial: "
1665                        "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1666                return PERMISSION_DENIED;
1667            }
1668            break;
1669        }
1670        case CAPTURE_SCREEN:
1671        {
1672            // codes that require permission check
1673            IPCThreadState* ipc = IPCThreadState::self();
1674            const int pid = ipc->getCallingPid();
1675            const int uid = ipc->getCallingUid();
1676            if ((uid != AID_GRAPHICS) &&
1677                    !PermissionCache::checkPermission(sReadFramebuffer, pid, uid)) {
1678                LOGE("Permission Denial: "
1679                        "can't read framebuffer pid=%d, uid=%d", pid, uid);
1680                return PERMISSION_DENIED;
1681            }
1682            break;
1683        }
1684    }
1685
1686    status_t err = BnSurfaceComposer::onTransact(code, data, reply, flags);
1687    if (err == UNKNOWN_TRANSACTION || err == PERMISSION_DENIED) {
1688        CHECK_INTERFACE(ISurfaceComposer, data, reply);
1689        if (UNLIKELY(!PermissionCache::checkCallingPermission(sHardwareTest))) {
1690            IPCThreadState* ipc = IPCThreadState::self();
1691            const int pid = ipc->getCallingPid();
1692            const int uid = ipc->getCallingUid();
1693            LOGE("Permission Denial: "
1694                    "can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);
1695            return PERMISSION_DENIED;
1696        }
1697        int n;
1698        switch (code) {
1699            case 1000: // SHOW_CPU, NOT SUPPORTED ANYMORE
1700            case 1001: // SHOW_FPS, NOT SUPPORTED ANYMORE
1701                return NO_ERROR;
1702            case 1002:  // SHOW_UPDATES
1703                n = data.readInt32();
1704                mDebugRegion = n ? n : (mDebugRegion ? 0 : 1);
1705                invalidateHwcGeometry();
1706                repaintEverything();
1707                return NO_ERROR;
1708            case 1003:  // SHOW_BACKGROUND
1709                n = data.readInt32();
1710                mDebugBackground = n ? 1 : 0;
1711                return NO_ERROR;
1712            case 1004:{ // repaint everything
1713                repaintEverything();
1714                return NO_ERROR;
1715            }
1716            case 1005:{ // force transaction
1717                setTransactionFlags(eTransactionNeeded|eTraversalNeeded);
1718                return NO_ERROR;
1719            }
1720            case 1006:{ // enable/disable GraphicLog
1721                int enabled = data.readInt32();
1722                GraphicLog::getInstance().setEnabled(enabled);
1723                return NO_ERROR;
1724            }
1725            case 1007: // set mFreezeCount
1726                mFreezeCount = data.readInt32();
1727                mFreezeDisplayTime = 0;
1728                return NO_ERROR;
1729            case 1008:  // toggle use of hw composer
1730                n = data.readInt32();
1731                mDebugDisableHWC = n ? 1 : 0;
1732                invalidateHwcGeometry();
1733                repaintEverything();
1734                return NO_ERROR;
1735            case 1009:  // toggle use of transform hint
1736                n = data.readInt32();
1737                mDebugDisableTransformHint = n ? 1 : 0;
1738                invalidateHwcGeometry();
1739                repaintEverything();
1740                return NO_ERROR;
1741            case 1010:  // interrogate.
1742                reply->writeInt32(0);
1743                reply->writeInt32(0);
1744                reply->writeInt32(mDebugRegion);
1745                reply->writeInt32(mDebugBackground);
1746                return NO_ERROR;
1747            case 1013: {
1748                Mutex::Autolock _l(mStateLock);
1749                const DisplayHardware& hw(graphicPlane(0).displayHardware());
1750                reply->writeInt32(hw.getPageFlipCount());
1751            }
1752            return NO_ERROR;
1753        }
1754    }
1755    return err;
1756}
1757
1758void SurfaceFlinger::repaintEverything() {
1759    Mutex::Autolock _l(mStateLock);
1760    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1761    mDirtyRegion.set(hw.bounds()); // careful that's not thread-safe
1762    signalEvent();
1763}
1764
1765// ---------------------------------------------------------------------------
1766
1767status_t SurfaceFlinger::renderScreenToTextureLocked(DisplayID dpy,
1768        GLuint* textureName, GLfloat* uOut, GLfloat* vOut)
1769{
1770    if (!GLExtensions::getInstance().haveFramebufferObject())
1771        return INVALID_OPERATION;
1772
1773    // get screen geometry
1774    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
1775    const uint32_t hw_w = hw.getWidth();
1776    const uint32_t hw_h = hw.getHeight();
1777    GLfloat u = 1;
1778    GLfloat v = 1;
1779
1780    // make sure to clear all GL error flags
1781    while ( glGetError() != GL_NO_ERROR ) ;
1782
1783    // create a FBO
1784    GLuint name, tname;
1785    glGenTextures(1, &tname);
1786    glBindTexture(GL_TEXTURE_2D, tname);
1787    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1788            hw_w, hw_h, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1789    if (glGetError() != GL_NO_ERROR) {
1790        while ( glGetError() != GL_NO_ERROR ) ;
1791        GLint tw = (2 << (31 - clz(hw_w)));
1792        GLint th = (2 << (31 - clz(hw_h)));
1793        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
1794                tw, th, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
1795        u = GLfloat(hw_w) / tw;
1796        v = GLfloat(hw_h) / th;
1797    }
1798    glGenFramebuffersOES(1, &name);
1799    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
1800    glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
1801            GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0);
1802
1803    // redraw the screen entirely...
1804    glClearColor(0,0,0,1);
1805    glClear(GL_COLOR_BUFFER_BIT);
1806    const Vector< sp<LayerBase> >& layers(mVisibleLayersSortedByZ);
1807    const size_t count = layers.size();
1808    for (size_t i=0 ; i<count ; ++i) {
1809        const sp<LayerBase>& layer(layers[i]);
1810        layer->drawForSreenShot();
1811    }
1812
1813    // back to main framebuffer
1814    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
1815    glDisable(GL_SCISSOR_TEST);
1816    glDeleteFramebuffersOES(1, &name);
1817
1818    *textureName = tname;
1819    *uOut = u;
1820    *vOut = v;
1821    return NO_ERROR;
1822}
1823
1824// ---------------------------------------------------------------------------
1825
1826status_t SurfaceFlinger::electronBeamOffAnimationImplLocked()
1827{
1828    status_t result = PERMISSION_DENIED;
1829
1830    if (!GLExtensions::getInstance().haveFramebufferObject())
1831        return INVALID_OPERATION;
1832
1833    // get screen geometry
1834    const DisplayHardware& hw(graphicPlane(0).displayHardware());
1835    const uint32_t hw_w = hw.getWidth();
1836    const uint32_t hw_h = hw.getHeight();
1837    const Region screenBounds(hw.bounds());
1838
1839    GLfloat u, v;
1840    GLuint tname;
1841    result = renderScreenToTextureLocked(0, &tname, &u, &v);
1842    if (result != NO_ERROR) {
1843        return result;
1844    }
1845
1846    GLfloat vtx[8];
1847    const GLfloat texCoords[4][2] = { {0,1}, {0,1-v}, {u,1-v}, {u,1} };
1848    glBindTexture(GL_TEXTURE_2D, tname);
1849    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1850    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1851    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1852    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
1853    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
1854    glVertexPointer(2, GL_FLOAT, 0, vtx);
1855
1856    /*
1857     * Texture coordinate mapping
1858     *
1859     *                 u
1860     *    1 +----------+---+
1861     *      |     |    |   |  image is inverted
1862     *      |     V    |   |  w.r.t. the texture
1863     *  1-v +----------+   |  coordinates
1864     *      |              |
1865     *      |              |
1866     *      |              |
1867     *    0 +--------------+
1868     *      0              1
1869     *
1870     */
1871
1872    class s_curve_interpolator {
1873        const float nbFrames, s, v;
1874    public:
1875        s_curve_interpolator(int nbFrames, float s)
1876        : nbFrames(1.0f / (nbFrames-1)), s(s),
1877          v(1.0f + expf(-s + 0.5f*s)) {
1878        }
1879        float operator()(int f) {
1880            const float x = f * nbFrames;
1881            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
1882        }
1883    };
1884
1885    class v_stretch {
1886        const GLfloat hw_w, hw_h;
1887    public:
1888        v_stretch(uint32_t hw_w, uint32_t hw_h)
1889        : hw_w(hw_w), hw_h(hw_h) {
1890        }
1891        void operator()(GLfloat* vtx, float v) {
1892            const GLfloat w = hw_w + (hw_w * v);
1893            const GLfloat h = hw_h - (hw_h * v);
1894            const GLfloat x = (hw_w - w) * 0.5f;
1895            const GLfloat y = (hw_h - h) * 0.5f;
1896            vtx[0] = x;         vtx[1] = y;
1897            vtx[2] = x;         vtx[3] = y + h;
1898            vtx[4] = x + w;     vtx[5] = y + h;
1899            vtx[6] = x + w;     vtx[7] = y;
1900        }
1901    };
1902
1903    class h_stretch {
1904        const GLfloat hw_w, hw_h;
1905    public:
1906        h_stretch(uint32_t hw_w, uint32_t hw_h)
1907        : hw_w(hw_w), hw_h(hw_h) {
1908        }
1909        void operator()(GLfloat* vtx, float v) {
1910            const GLfloat w = hw_w - (hw_w * v);
1911            const GLfloat h = 1.0f;
1912            const GLfloat x = (hw_w - w) * 0.5f;
1913            const GLfloat y = (hw_h - h) * 0.5f;
1914            vtx[0] = x;         vtx[1] = y;
1915            vtx[2] = x;         vtx[3] = y + h;
1916            vtx[4] = x + w;     vtx[5] = y + h;
1917            vtx[6] = x + w;     vtx[7] = y;
1918        }
1919    };
1920
1921    // the full animation is 24 frames
1922    char value[PROPERTY_VALUE_MAX];
1923    property_get("debug.sf.electron_frames", value, "24");
1924    int nbFrames = (atoi(value) + 1) >> 1;
1925    if (nbFrames <= 0) // just in case
1926        nbFrames = 24;
1927
1928    s_curve_interpolator itr(nbFrames, 7.5f);
1929    s_curve_interpolator itg(nbFrames, 8.0f);
1930    s_curve_interpolator itb(nbFrames, 8.5f);
1931
1932    v_stretch vverts(hw_w, hw_h);
1933    glEnable(GL_BLEND);
1934    glBlendFunc(GL_ONE, GL_ONE);
1935    for (int i=0 ; i<nbFrames ; i++) {
1936        float x, y, w, h;
1937        const float vr = itr(i);
1938        const float vg = itg(i);
1939        const float vb = itb(i);
1940
1941        // clear screen
1942        glColorMask(1,1,1,1);
1943        glClear(GL_COLOR_BUFFER_BIT);
1944        glEnable(GL_TEXTURE_2D);
1945
1946        // draw the red plane
1947        vverts(vtx, vr);
1948        glColorMask(1,0,0,1);
1949        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1950
1951        // draw the green plane
1952        vverts(vtx, vg);
1953        glColorMask(0,1,0,1);
1954        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1955
1956        // draw the blue plane
1957        vverts(vtx, vb);
1958        glColorMask(0,0,1,1);
1959        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1960
1961        // draw the white highlight (we use the last vertices)
1962        glDisable(GL_TEXTURE_2D);
1963        glColorMask(1,1,1,1);
1964        glColor4f(vg, vg, vg, 1);
1965        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1966        hw.flip(screenBounds);
1967    }
1968
1969    h_stretch hverts(hw_w, hw_h);
1970    glDisable(GL_BLEND);
1971    glDisable(GL_TEXTURE_2D);
1972    glColorMask(1,1,1,1);
1973    for (int i=0 ; i<nbFrames ; i++) {
1974        const float v = itg(i);
1975        hverts(vtx, v);
1976        glClear(GL_COLOR_BUFFER_BIT);
1977        glColor4f(1-v, 1-v, 1-v, 1);
1978        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1979        hw.flip(screenBounds);
1980    }
1981
1982    glColorMask(1,1,1,1);
1983    glEnable(GL_SCISSOR_TEST);
1984    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
1985    glDeleteTextures(1, &tname);
1986    glDisable(GL_TEXTURE_2D);
1987    return NO_ERROR;
1988}
1989
1990status_t SurfaceFlinger::electronBeamOnAnimationImplLocked()
1991{
1992    status_t result = PERMISSION_DENIED;
1993
1994    if (!GLExtensions::getInstance().haveFramebufferObject())
1995        return INVALID_OPERATION;
1996
1997
1998    // get screen geometry
1999    const DisplayHardware& hw(graphicPlane(0).displayHardware());
2000    const uint32_t hw_w = hw.getWidth();
2001    const uint32_t hw_h = hw.getHeight();
2002    const Region screenBounds(hw.bounds());
2003
2004    GLfloat u, v;
2005    GLuint tname;
2006    result = renderScreenToTextureLocked(0, &tname, &u, &v);
2007    if (result != NO_ERROR) {
2008        return result;
2009    }
2010
2011    // back to main framebuffer
2012    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2013    glDisable(GL_SCISSOR_TEST);
2014
2015    GLfloat vtx[8];
2016    const GLfloat texCoords[4][2] = { {0,v}, {0,0}, {u,0}, {u,v} };
2017    glBindTexture(GL_TEXTURE_2D, tname);
2018    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
2019    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2020    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
2021    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
2022    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
2023    glVertexPointer(2, GL_FLOAT, 0, vtx);
2024
2025    class s_curve_interpolator {
2026        const float nbFrames, s, v;
2027    public:
2028        s_curve_interpolator(int nbFrames, float s)
2029        : nbFrames(1.0f / (nbFrames-1)), s(s),
2030          v(1.0f + expf(-s + 0.5f*s)) {
2031        }
2032        float operator()(int f) {
2033            const float x = f * nbFrames;
2034            return ((1.0f/(1.0f + expf(-x*s + 0.5f*s))) - 0.5f) * v + 0.5f;
2035        }
2036    };
2037
2038    class v_stretch {
2039        const GLfloat hw_w, hw_h;
2040    public:
2041        v_stretch(uint32_t hw_w, uint32_t hw_h)
2042        : hw_w(hw_w), hw_h(hw_h) {
2043        }
2044        void operator()(GLfloat* vtx, float v) {
2045            const GLfloat w = hw_w + (hw_w * v);
2046            const GLfloat h = hw_h - (hw_h * v);
2047            const GLfloat x = (hw_w - w) * 0.5f;
2048            const GLfloat y = (hw_h - h) * 0.5f;
2049            vtx[0] = x;         vtx[1] = y;
2050            vtx[2] = x;         vtx[3] = y + h;
2051            vtx[4] = x + w;     vtx[5] = y + h;
2052            vtx[6] = x + w;     vtx[7] = y;
2053        }
2054    };
2055
2056    class h_stretch {
2057        const GLfloat hw_w, hw_h;
2058    public:
2059        h_stretch(uint32_t hw_w, uint32_t hw_h)
2060        : hw_w(hw_w), hw_h(hw_h) {
2061        }
2062        void operator()(GLfloat* vtx, float v) {
2063            const GLfloat w = hw_w - (hw_w * v);
2064            const GLfloat h = 1.0f;
2065            const GLfloat x = (hw_w - w) * 0.5f;
2066            const GLfloat y = (hw_h - h) * 0.5f;
2067            vtx[0] = x;         vtx[1] = y;
2068            vtx[2] = x;         vtx[3] = y + h;
2069            vtx[4] = x + w;     vtx[5] = y + h;
2070            vtx[6] = x + w;     vtx[7] = y;
2071        }
2072    };
2073
2074    // the full animation is 12 frames
2075    int nbFrames = 8;
2076    s_curve_interpolator itr(nbFrames, 7.5f);
2077    s_curve_interpolator itg(nbFrames, 8.0f);
2078    s_curve_interpolator itb(nbFrames, 8.5f);
2079
2080    h_stretch hverts(hw_w, hw_h);
2081    glDisable(GL_BLEND);
2082    glDisable(GL_TEXTURE_2D);
2083    glColorMask(1,1,1,1);
2084    for (int i=nbFrames-1 ; i>=0 ; i--) {
2085        const float v = itg(i);
2086        hverts(vtx, v);
2087        glClear(GL_COLOR_BUFFER_BIT);
2088        glColor4f(1-v, 1-v, 1-v, 1);
2089        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2090        hw.flip(screenBounds);
2091    }
2092
2093    nbFrames = 4;
2094    v_stretch vverts(hw_w, hw_h);
2095    glEnable(GL_BLEND);
2096    glBlendFunc(GL_ONE, GL_ONE);
2097    for (int i=nbFrames-1 ; i>=0 ; i--) {
2098        float x, y, w, h;
2099        const float vr = itr(i);
2100        const float vg = itg(i);
2101        const float vb = itb(i);
2102
2103        // clear screen
2104        glColorMask(1,1,1,1);
2105        glClear(GL_COLOR_BUFFER_BIT);
2106        glEnable(GL_TEXTURE_2D);
2107
2108        // draw the red plane
2109        vverts(vtx, vr);
2110        glColorMask(1,0,0,1);
2111        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2112
2113        // draw the green plane
2114        vverts(vtx, vg);
2115        glColorMask(0,1,0,1);
2116        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2117
2118        // draw the blue plane
2119        vverts(vtx, vb);
2120        glColorMask(0,0,1,1);
2121        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
2122
2123        hw.flip(screenBounds);
2124    }
2125
2126    glColorMask(1,1,1,1);
2127    glEnable(GL_SCISSOR_TEST);
2128    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
2129    glDeleteTextures(1, &tname);
2130    glDisable(GL_TEXTURE_2D);
2131
2132    return NO_ERROR;
2133}
2134
2135// ---------------------------------------------------------------------------
2136
2137status_t SurfaceFlinger::turnElectronBeamOffImplLocked(int32_t mode)
2138{
2139    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2140    if (!hw.canDraw()) {
2141        // we're already off
2142        return NO_ERROR;
2143    }
2144
2145    // turn off hwc while we're doing the animation
2146    hw.getHwComposer().disable();
2147    // and make sure to turn it back on (if needed) next time we compose
2148    invalidateHwcGeometry();
2149
2150    if (mode & ISurfaceComposer::eElectronBeamAnimationOff) {
2151        electronBeamOffAnimationImplLocked();
2152    }
2153
2154    // always clear the whole screen at the end of the animation
2155    glClearColor(0,0,0,1);
2156    glDisable(GL_SCISSOR_TEST);
2157    glClear(GL_COLOR_BUFFER_BIT);
2158    glEnable(GL_SCISSOR_TEST);
2159    hw.flip( Region(hw.bounds()) );
2160
2161    hw.setCanDraw(false);
2162    return NO_ERROR;
2163}
2164
2165status_t SurfaceFlinger::turnElectronBeamOff(int32_t mode)
2166{
2167    class MessageTurnElectronBeamOff : public MessageBase {
2168        SurfaceFlinger* flinger;
2169        int32_t mode;
2170        status_t result;
2171    public:
2172        MessageTurnElectronBeamOff(SurfaceFlinger* flinger, int32_t mode)
2173            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2174        }
2175        status_t getResult() const {
2176            return result;
2177        }
2178        virtual bool handler() {
2179            Mutex::Autolock _l(flinger->mStateLock);
2180            result = flinger->turnElectronBeamOffImplLocked(mode);
2181            return true;
2182        }
2183    };
2184
2185    sp<MessageBase> msg = new MessageTurnElectronBeamOff(this, mode);
2186    status_t res = postMessageSync(msg);
2187    if (res == NO_ERROR) {
2188        res = static_cast<MessageTurnElectronBeamOff*>( msg.get() )->getResult();
2189
2190        // work-around: when the power-manager calls us we activate the
2191        // animation. eventually, the "on" animation will be called
2192        // by the power-manager itself
2193        mElectronBeamAnimationMode = mode;
2194    }
2195    return res;
2196}
2197
2198// ---------------------------------------------------------------------------
2199
2200status_t SurfaceFlinger::turnElectronBeamOnImplLocked(int32_t mode)
2201{
2202    DisplayHardware& hw(graphicPlane(0).editDisplayHardware());
2203    if (hw.canDraw()) {
2204        // we're already on
2205        return NO_ERROR;
2206    }
2207    if (mode & ISurfaceComposer::eElectronBeamAnimationOn) {
2208        electronBeamOnAnimationImplLocked();
2209    }
2210    hw.setCanDraw(true);
2211
2212    // make sure to redraw the whole screen when the animation is done
2213    mDirtyRegion.set(hw.bounds());
2214    signalEvent();
2215
2216    return NO_ERROR;
2217}
2218
2219status_t SurfaceFlinger::turnElectronBeamOn(int32_t mode)
2220{
2221    class MessageTurnElectronBeamOn : public MessageBase {
2222        SurfaceFlinger* flinger;
2223        int32_t mode;
2224        status_t result;
2225    public:
2226        MessageTurnElectronBeamOn(SurfaceFlinger* flinger, int32_t mode)
2227            : flinger(flinger), mode(mode), result(PERMISSION_DENIED) {
2228        }
2229        status_t getResult() const {
2230            return result;
2231        }
2232        virtual bool handler() {
2233            Mutex::Autolock _l(flinger->mStateLock);
2234            result = flinger->turnElectronBeamOnImplLocked(mode);
2235            return true;
2236        }
2237    };
2238
2239    postMessageAsync( new MessageTurnElectronBeamOn(this, mode) );
2240    return NO_ERROR;
2241}
2242
2243// ---------------------------------------------------------------------------
2244
2245status_t SurfaceFlinger::captureScreenImplLocked(DisplayID dpy,
2246        sp<IMemoryHeap>* heap,
2247        uint32_t* w, uint32_t* h, PixelFormat* f,
2248        uint32_t sw, uint32_t sh,
2249        uint32_t minLayerZ, uint32_t maxLayerZ)
2250{
2251    status_t result = PERMISSION_DENIED;
2252
2253    // only one display supported for now
2254    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2255        return BAD_VALUE;
2256
2257    // make sure none of the layers are protected
2258    const LayerVector& layers(mDrawingState.layersSortedByZ);
2259    const size_t count = layers.size();
2260    for (size_t i=0 ; i<count ; ++i) {
2261        const sp<LayerBase>& layer(layers[i]);
2262        const uint32_t flags = layer->drawingState().flags;
2263        if (!(flags & ISurfaceComposer::eLayerHidden)) {
2264            const uint32_t z = layer->drawingState().z;
2265            if (z >= minLayerZ && z <= maxLayerZ) {
2266                if (layer->isProtected()) {
2267                    return INVALID_OPERATION;
2268                }
2269            }
2270        }
2271    }
2272
2273    if (!GLExtensions::getInstance().haveFramebufferObject())
2274        return INVALID_OPERATION;
2275
2276    // get screen geometry
2277    const DisplayHardware& hw(graphicPlane(dpy).displayHardware());
2278    const uint32_t hw_w = hw.getWidth();
2279    const uint32_t hw_h = hw.getHeight();
2280
2281    if ((sw > hw_w) || (sh > hw_h))
2282        return BAD_VALUE;
2283
2284    sw = (!sw) ? hw_w : sw;
2285    sh = (!sh) ? hw_h : sh;
2286    const size_t size = sw * sh * 4;
2287
2288    //LOGD("screenshot: sw=%d, sh=%d, minZ=%d, maxZ=%d",
2289    //        sw, sh, minLayerZ, maxLayerZ);
2290
2291    // make sure to clear all GL error flags
2292    while ( glGetError() != GL_NO_ERROR ) ;
2293
2294    // create a FBO
2295    GLuint name, tname;
2296    glGenRenderbuffersOES(1, &tname);
2297    glBindRenderbufferOES(GL_RENDERBUFFER_OES, tname);
2298    glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGBA8_OES, sw, sh);
2299    glGenFramebuffersOES(1, &name);
2300    glBindFramebufferOES(GL_FRAMEBUFFER_OES, name);
2301    glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
2302            GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, tname);
2303
2304    GLenum status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
2305
2306    if (status == GL_FRAMEBUFFER_COMPLETE_OES) {
2307
2308        // invert everything, b/c glReadPixel() below will invert the FB
2309        glViewport(0, 0, sw, sh);
2310        glScissor(0, 0, sw, sh);
2311        glEnable(GL_SCISSOR_TEST);
2312        glMatrixMode(GL_PROJECTION);
2313        glPushMatrix();
2314        glLoadIdentity();
2315        glOrthof(0, hw_w, hw_h, 0, 0, 1);
2316        glMatrixMode(GL_MODELVIEW);
2317
2318        // redraw the screen entirely...
2319        glClearColor(0,0,0,1);
2320        glClear(GL_COLOR_BUFFER_BIT);
2321
2322        for (size_t i=0 ; i<count ; ++i) {
2323            const sp<LayerBase>& layer(layers[i]);
2324            const uint32_t flags = layer->drawingState().flags;
2325            if (!(flags & ISurfaceComposer::eLayerHidden)) {
2326                const uint32_t z = layer->drawingState().z;
2327                if (z >= minLayerZ && z <= maxLayerZ) {
2328                    layer->drawForSreenShot();
2329                }
2330            }
2331        }
2332
2333        // XXX: this is needed on tegra
2334        glEnable(GL_SCISSOR_TEST);
2335        glScissor(0, 0, sw, sh);
2336
2337        // check for errors and return screen capture
2338        if (glGetError() != GL_NO_ERROR) {
2339            // error while rendering
2340            result = INVALID_OPERATION;
2341        } else {
2342            // allocate shared memory large enough to hold the
2343            // screen capture
2344            sp<MemoryHeapBase> base(
2345                    new MemoryHeapBase(size, 0, "screen-capture") );
2346            void* const ptr = base->getBase();
2347            if (ptr) {
2348                // capture the screen with glReadPixels()
2349                glReadPixels(0, 0, sw, sh, GL_RGBA, GL_UNSIGNED_BYTE, ptr);
2350                if (glGetError() == GL_NO_ERROR) {
2351                    *heap = base;
2352                    *w = sw;
2353                    *h = sh;
2354                    *f = PIXEL_FORMAT_RGBA_8888;
2355                    result = NO_ERROR;
2356                }
2357            } else {
2358                result = NO_MEMORY;
2359            }
2360        }
2361        glEnable(GL_SCISSOR_TEST);
2362        glViewport(0, 0, hw_w, hw_h);
2363        glMatrixMode(GL_PROJECTION);
2364        glPopMatrix();
2365        glMatrixMode(GL_MODELVIEW);
2366    } else {
2367        result = BAD_VALUE;
2368    }
2369
2370    // release FBO resources
2371    glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
2372    glDeleteRenderbuffersOES(1, &tname);
2373    glDeleteFramebuffersOES(1, &name);
2374
2375    hw.compositionComplete();
2376
2377    // LOGD("screenshot: result = %s", result<0 ? strerror(result) : "OK");
2378
2379    return result;
2380}
2381
2382
2383status_t SurfaceFlinger::captureScreen(DisplayID dpy,
2384        sp<IMemoryHeap>* heap,
2385        uint32_t* width, uint32_t* height, PixelFormat* format,
2386        uint32_t sw, uint32_t sh,
2387        uint32_t minLayerZ, uint32_t maxLayerZ)
2388{
2389    // only one display supported for now
2390    if (UNLIKELY(uint32_t(dpy) >= DISPLAY_COUNT))
2391        return BAD_VALUE;
2392
2393    if (!GLExtensions::getInstance().haveFramebufferObject())
2394        return INVALID_OPERATION;
2395
2396    class MessageCaptureScreen : public MessageBase {
2397        SurfaceFlinger* flinger;
2398        DisplayID dpy;
2399        sp<IMemoryHeap>* heap;
2400        uint32_t* w;
2401        uint32_t* h;
2402        PixelFormat* f;
2403        uint32_t sw;
2404        uint32_t sh;
2405        uint32_t minLayerZ;
2406        uint32_t maxLayerZ;
2407        status_t result;
2408    public:
2409        MessageCaptureScreen(SurfaceFlinger* flinger, DisplayID dpy,
2410                sp<IMemoryHeap>* heap, uint32_t* w, uint32_t* h, PixelFormat* f,
2411                uint32_t sw, uint32_t sh,
2412                uint32_t minLayerZ, uint32_t maxLayerZ)
2413            : flinger(flinger), dpy(dpy),
2414              heap(heap), w(w), h(h), f(f), sw(sw), sh(sh),
2415              minLayerZ(minLayerZ), maxLayerZ(maxLayerZ),
2416              result(PERMISSION_DENIED)
2417        {
2418        }
2419        status_t getResult() const {
2420            return result;
2421        }
2422        virtual bool handler() {
2423            Mutex::Autolock _l(flinger->mStateLock);
2424
2425            // if we have secure windows, never allow the screen capture
2426            if (flinger->mSecureFrameBuffer)
2427                return true;
2428
2429            result = flinger->captureScreenImplLocked(dpy,
2430                    heap, w, h, f, sw, sh, minLayerZ, maxLayerZ);
2431
2432            return true;
2433        }
2434    };
2435
2436    sp<MessageBase> msg = new MessageCaptureScreen(this,
2437            dpy, heap, width, height, format, sw, sh, minLayerZ, maxLayerZ);
2438    status_t res = postMessageSync(msg);
2439    if (res == NO_ERROR) {
2440        res = static_cast<MessageCaptureScreen*>( msg.get() )->getResult();
2441    }
2442    return res;
2443}
2444
2445// ---------------------------------------------------------------------------
2446
2447sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
2448{
2449    sp<Layer> result;
2450    Mutex::Autolock _l(mStateLock);
2451    result = mLayerMap.valueFor( sur->asBinder() ).promote();
2452    return result;
2453}
2454
2455// ---------------------------------------------------------------------------
2456
2457Client::Client(const sp<SurfaceFlinger>& flinger)
2458    : mFlinger(flinger), mNameGenerator(1)
2459{
2460}
2461
2462Client::~Client()
2463{
2464    const size_t count = mLayers.size();
2465    for (size_t i=0 ; i<count ; i++) {
2466        sp<LayerBaseClient> layer(mLayers.valueAt(i).promote());
2467        if (layer != 0) {
2468            mFlinger->removeLayer(layer);
2469        }
2470    }
2471}
2472
2473status_t Client::initCheck() const {
2474    return NO_ERROR;
2475}
2476
2477size_t Client::attachLayer(const sp<LayerBaseClient>& layer)
2478{
2479    Mutex::Autolock _l(mLock);
2480    size_t name = mNameGenerator++;
2481    mLayers.add(name, layer);
2482    return name;
2483}
2484
2485void Client::detachLayer(const LayerBaseClient* layer)
2486{
2487    Mutex::Autolock _l(mLock);
2488    // we do a linear search here, because this doesn't happen often
2489    const size_t count = mLayers.size();
2490    for (size_t i=0 ; i<count ; i++) {
2491        if (mLayers.valueAt(i) == layer) {
2492            mLayers.removeItemsAt(i, 1);
2493            break;
2494        }
2495    }
2496}
2497sp<LayerBaseClient> Client::getLayerUser(int32_t i) const
2498{
2499    Mutex::Autolock _l(mLock);
2500    sp<LayerBaseClient> lbc;
2501    wp<LayerBaseClient> layer(mLayers.valueFor(i));
2502    if (layer != 0) {
2503        lbc = layer.promote();
2504        LOGE_IF(lbc==0, "getLayerUser(name=%d) is dead", int(i));
2505    }
2506    return lbc;
2507}
2508
2509
2510status_t Client::onTransact(
2511    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
2512{
2513    // these must be checked
2514     IPCThreadState* ipc = IPCThreadState::self();
2515     const int pid = ipc->getCallingPid();
2516     const int uid = ipc->getCallingUid();
2517     const int self_pid = getpid();
2518     if (UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
2519         // we're called from a different process, do the real check
2520         if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
2521         {
2522             LOGE("Permission Denial: "
2523                     "can't openGlobalTransaction pid=%d, uid=%d", pid, uid);
2524             return PERMISSION_DENIED;
2525         }
2526     }
2527     return BnSurfaceComposerClient::onTransact(code, data, reply, flags);
2528}
2529
2530
2531sp<ISurface> Client::createSurface(
2532        ISurfaceComposerClient::surface_data_t* params,
2533        const String8& name,
2534        DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2535        uint32_t flags)
2536{
2537    /*
2538     * createSurface must be called from the GL thread so that it can
2539     * have access to the GL context.
2540     */
2541
2542    class MessageCreateSurface : public MessageBase {
2543        sp<ISurface> result;
2544        SurfaceFlinger* flinger;
2545        ISurfaceComposerClient::surface_data_t* params;
2546        Client* client;
2547        const String8& name;
2548        DisplayID display;
2549        uint32_t w, h;
2550        PixelFormat format;
2551        uint32_t flags;
2552    public:
2553        MessageCreateSurface(SurfaceFlinger* flinger,
2554                ISurfaceComposerClient::surface_data_t* params,
2555                const String8& name, Client* client,
2556                DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
2557                uint32_t flags)
2558            : flinger(flinger), params(params), client(client), name(name),
2559              display(display), w(w), h(h), format(format), flags(flags)
2560        {
2561        }
2562        sp<ISurface> getResult() const { return result; }
2563        virtual bool handler() {
2564            result = flinger->createSurface(params, name, client,
2565                    display, w, h, format, flags);
2566            return true;
2567        }
2568    };
2569
2570    sp<MessageBase> msg = new MessageCreateSurface(mFlinger.get(),
2571            params, name, this, display, w, h, format, flags);
2572    mFlinger->postMessageSync(msg);
2573    return static_cast<MessageCreateSurface*>( msg.get() )->getResult();
2574}
2575status_t Client::destroySurface(SurfaceID sid) {
2576    return mFlinger->removeSurface(this, sid);
2577}
2578
2579// ---------------------------------------------------------------------------
2580
2581GraphicBufferAlloc::GraphicBufferAlloc() {}
2582
2583GraphicBufferAlloc::~GraphicBufferAlloc() {}
2584
2585sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
2586        PixelFormat format, uint32_t usage, status_t* error) {
2587    sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
2588    status_t err = graphicBuffer->initCheck();
2589    *error = err;
2590    if (err != 0 || graphicBuffer->handle == 0) {
2591        if (err == NO_MEMORY) {
2592            GraphicBuffer::dumpAllocationsToSystemLog();
2593        }
2594        LOGE("GraphicBufferAlloc::createGraphicBuffer(w=%d, h=%d) "
2595             "failed (%s), handle=%p",
2596                w, h, strerror(-err), graphicBuffer->handle);
2597        return 0;
2598    }
2599    return graphicBuffer;
2600}
2601
2602// ---------------------------------------------------------------------------
2603
2604GraphicPlane::GraphicPlane()
2605    : mHw(0)
2606{
2607}
2608
2609GraphicPlane::~GraphicPlane() {
2610    delete mHw;
2611}
2612
2613bool GraphicPlane::initialized() const {
2614    return mHw ? true : false;
2615}
2616
2617int GraphicPlane::getWidth() const {
2618    return mWidth;
2619}
2620
2621int GraphicPlane::getHeight() const {
2622    return mHeight;
2623}
2624
2625void GraphicPlane::setDisplayHardware(DisplayHardware *hw)
2626{
2627    mHw = hw;
2628
2629    // initialize the display orientation transform.
2630    // it's a constant that should come from the display driver.
2631    int displayOrientation = ISurfaceComposer::eOrientationDefault;
2632    char property[PROPERTY_VALUE_MAX];
2633    if (property_get("ro.sf.hwrotation", property, NULL) > 0) {
2634        //displayOrientation
2635        switch (atoi(property)) {
2636        case 90:
2637            displayOrientation = ISurfaceComposer::eOrientation90;
2638            break;
2639        case 270:
2640            displayOrientation = ISurfaceComposer::eOrientation270;
2641            break;
2642        }
2643    }
2644
2645    const float w = hw->getWidth();
2646    const float h = hw->getHeight();
2647    GraphicPlane::orientationToTransfrom(displayOrientation, w, h,
2648            &mDisplayTransform);
2649    if (displayOrientation & ISurfaceComposer::eOrientationSwapMask) {
2650        mDisplayWidth = h;
2651        mDisplayHeight = w;
2652    } else {
2653        mDisplayWidth = w;
2654        mDisplayHeight = h;
2655    }
2656
2657    setOrientation(ISurfaceComposer::eOrientationDefault);
2658}
2659
2660status_t GraphicPlane::orientationToTransfrom(
2661        int orientation, int w, int h, Transform* tr)
2662{
2663    uint32_t flags = 0;
2664    switch (orientation) {
2665    case ISurfaceComposer::eOrientationDefault:
2666        flags = Transform::ROT_0;
2667        break;
2668    case ISurfaceComposer::eOrientation90:
2669        flags = Transform::ROT_90;
2670        break;
2671    case ISurfaceComposer::eOrientation180:
2672        flags = Transform::ROT_180;
2673        break;
2674    case ISurfaceComposer::eOrientation270:
2675        flags = Transform::ROT_270;
2676        break;
2677    default:
2678        return BAD_VALUE;
2679    }
2680    tr->set(flags, w, h);
2681    return NO_ERROR;
2682}
2683
2684status_t GraphicPlane::setOrientation(int orientation)
2685{
2686    // If the rotation can be handled in hardware, this is where
2687    // the magic should happen.
2688
2689    const DisplayHardware& hw(displayHardware());
2690    const float w = mDisplayWidth;
2691    const float h = mDisplayHeight;
2692    mWidth = int(w);
2693    mHeight = int(h);
2694
2695    Transform orientationTransform;
2696    GraphicPlane::orientationToTransfrom(orientation, w, h,
2697            &orientationTransform);
2698    if (orientation & ISurfaceComposer::eOrientationSwapMask) {
2699        mWidth = int(h);
2700        mHeight = int(w);
2701    }
2702
2703    mOrientation = orientation;
2704    mGlobalTransform = mDisplayTransform * orientationTransform;
2705    return NO_ERROR;
2706}
2707
2708const DisplayHardware& GraphicPlane::displayHardware() const {
2709    return *mHw;
2710}
2711
2712DisplayHardware& GraphicPlane::editDisplayHardware() {
2713    return *mHw;
2714}
2715
2716const Transform& GraphicPlane::transform() const {
2717    return mGlobalTransform;
2718}
2719
2720EGLDisplay GraphicPlane::getEGLDisplay() const {
2721    return mHw->getEGLDisplay();
2722}
2723
2724// ---------------------------------------------------------------------------
2725
2726}; // namespace android
2727